/Engine/Source/Editor/ViewportInteraction/Public/ViewportWorldInteraction.h
Gets a list of all of the objects we're currently interacting with, such as selected actors
[TArray](API\Runtime\Core\Containers\TArray)< [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FViewportTransformable](API\Editor\ViewportInteraction\FViewportTransformable) > > & GetTransformables()